Conical conduit joint

Abstract

The utility model discloses a conical guide pipe connector, and relates to the technical field of guide pipe assembly. Comprising a transfusion section, an elastic piece and a cannula section, an accommodating cavity for mounting the elastic piece is formed in the intubation tube section, and the elastic piece and the accommodating cavity are the same in shape and are both bullet-shaped; the elastic piece is axially provided with an inserting hole for inserting a guide pipe; the infusion section is detachably connected to the far end of the cannula section, the infusion section is provided with a jacking end capable of stretching into the containing cavity to abut against the elastic piece when the infusion section is connected with the cannula section, a communicating hole is formed in the jacking end, and the communicating hole is communicated with the inserting hole so that liquid medicine in the infusion apparatus can enter a catheter of the inserting hole through the communicating hole; the whole elastic piece rotates synchronously with the infusion section under the abutting action of the ejecting end, the phenomenon that the elastic piece is twisted or locally twisted in the assembly process of the infusion section and the intubation section can be avoided, and the phenomenon that a catheter is extruded or even flattened due to twisting of the elastic piece is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of catheter assembly, and particularly relates to a conical catheter joint. BACKGROUND

[0002] Large-size catheter joints are usually directly connected with the end head part of a catheter by bonding or welding before leaving the factory by a production enterprise. However, small-size catheters or micro catheters need to be inserted into or out of a needle cavity or a laparoscope cavity and the like in use, for example, an epidural nerve block, which has the advantages of simple operation, low cost, easy movement of a pipeline during an operation and easy epidural analgesia after the operation, and has become a widely used anesthetic method in clinical application. The outer diameter of an anesthetic catheter used in the application process is generally not more than 1 mm. Since the anesthetic catheter is too soft and has no sharp needle end, the needle cavity channel of an epidural needle needs to be inserted into an epidural space first in the use process, and then the epidural needle is withdrawn along the entire anesthetic catheter body after the anesthetic catheter is in place. Therefore, medical workers can connect the catheter joint to the anesthetic catheter only after the epidural needle is completely withdrawn. Therefore, small-size catheters or micro catheters like this cannot be directly connected with the end head part of a catheter by a production enterprise before leaving the factory.

[0003] Most catheter joints are cylindrical elastic members that can wrap a catheter. A doctor needs to connect the catheter joint by himself. The rotating and extruding force during the connection of the catheter joint makes the inner diameter of the cylindrical elastic member decrease, so as to wrap the catheter tightly. In order to facilitate the doctor to insert the catheter into the inner cavity of the elastic member, the inner diameter of the inner cavity of the elastic member is usually made larger. The doctor needs to rotate several turns to lock tightly. During the tightening process, the cylindrical elastic member may be twisted or suddenly thinned due to different operation forces and speeds of different doctors, so as to cause the catheter to be twisted or partially clamped in the elastic member and blocked.

[0004] Although the previous product can reduce the probability of blocking the catheter by the catheter joint by increasing the pitch of the thread or increasing the limiting device, the structure is too complex, the production difficulty and production cost are increased, and only a catheter with a fixed size can be used. The locking effect will be poor when the outer diameter of the catheter is too large or too small, and the catheter is easily pulled out of the catheter joint under the action of an external force. Moreover, since the catheter joint is not transparent, the actual locking effect cannot be seen. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of taper catheter joint, to solve the process that medical staff manually operates catheter connection in above-mentioned technical problem needs to be locked by rotating multiple turns, and elastic member appears kink due to different force during tightening process, and it leads to catheter is clamped or blocked and cannot be used;Only can be applied to fixed size, lead to outer diameter is too large or too small cannot be locked, and the scope of application is small.

[0006] The utility model employs the technical scheme that:

[0007] A kind of taper catheter joint, including infusion section, elastic member and cannula section;

[0008] The cannula section is provided with accommodating cavity for installing elastic member, the elastic member is same with the accommodating cavity in shape, and both are bullet head shape;The elastic member is provided with insertion hole for inserting catheter along axial direction;

[0009] The infusion section is detachably connected to the distal end of the cannula section, the infusion section has a top end that can extend into the accommodating cavity and abut against the elastic member when the infusion section is connected to the cannula section, a communication hole is formed in the top end, and the communication hole is in communication with the insertion hole to allow the liquid medicine in the infusion device to enter the catheter in the insertion hole through the communication hole.

[0010] The utility model also has the following additional technical features:

[0011] The cannula section is provided with a horn opening in communication with the accommodating cavity on one side of the accommodating cavity, and the catheter is inserted into the insertion hole of the elastic member from one side of the horn opening.

[0012] The accommodating cavity includes a first accommodating cavity and a second accommodating cavity along the axial direction, the projection of the first accommodating cavity in the radial direction is in a conical structure, and the two sides form outwardly protruding arc surface conical shapes;The projection of the second accommodating cavity in the radial direction is in a square structure, and the two sides form horizontal shapes;The first accommodating cavity has a communication port in communication with the insertion hole on the side of the horn opening, and the communication port is in communication with the horn opening to allow the catheter to enter the insertion hole through the communication port via the horn opening.

[0013] The elastic member has a thin end on the side of the horn opening and a thick end on the side of the infusion section, the inner diameter of the thin end gradually increases to the thick end, the insertion hole is formed in the elastic member along the axial direction from the thin end to the thick end, and the inner diameter of the insertion hole is the same as the inner diameter of the opening hole on the side of the horn opening towards the thin end.

[0014] The outer periphery of the distal end of the cannula section is provided with external threads, one end of the infusion section is provided with internal threads, the external threads of the cannula section are connected with the internal threads of the infusion section, so that the infusion section is detachably connected to the outside of the cannula section; or the outer periphery of the distal end of the cannula section is provided with a clamping groove, one end of the infusion section is provided with a clasp, the clamping groove is matched with the clasp, so that the infusion section is detachably connected to the outside of the cannula section.

[0015] The infusion section comprises a first infusion section and a second infusion section connected with each other; the first infusion section is internally provided with a first cavity, and the inner wall of the first cavity is provided with internal threads connected with the cannula section, so as to connect the first infusion section to the accommodating cavity of the cannula section; the second infusion section is internally provided with a tapered hole, and the tapered hole forms a plug-in part connected with an infusion device.

[0016] The first cavity is internally connected with a top-in end extending along the axis, the top-in end extends along the axis direction of the first cavity, the top-in end is provided with a connecting hole for placing an injection end head on the side facing the second infusion section, and the connecting hole is connected between the communicating hole and the tapered hole, so as to connect the communicating hole and the tapered hole to form a fluid channel for liquid medicine flow.

[0017] The top-in end and the inner wall of the first cavity have a reserved gap therebetween, so that an installation space is formed between the infusion section and the cannula section, and the infusion section is conveniently connected to the outside of the cannula section by threads.

[0018] The outer periphery of the cannula section is symmetrically connected with a first lug in the radial direction, the outer periphery of the first infusion section is connected with a second lug in the radial direction, the cannula section is rotated through the first lug, the first infusion section is rotated through the second lug, and the external threads of the cannula section are screw-connected with the internal threads of the first infusion section.

[0019] The cannula section and the infusion section are made of transparent hard plastic, and the elastic member is made of soft and elastic transparent material.

[0020] Thanks to the above technical scheme, the utility model has the following beneficial effects:

[0021] 1. A tapered catheter joint, comprising an infusion section, an elastic member and a cannula section; the cannula section is provided with an accommodating cavity for mounting the elastic member, the elastic member and the accommodating cavity are of the same shape and are both bullet-shaped; the elastic member is internally provided with a plug-in hole for inserting a catheter along the axial direction; the infusion section is detachably connected to the distal end of the cannula section, the infusion section has a top-in end capable of extending into the accommodating cavity and abutting against the elastic member when the infusion section and the cannula section are connected, the top-in end is internally provided with a communicating hole, and the communicating hole is communicated with the plug-in hole, so that liquid medicine in an infusion device enters the catheter in the plug-in hole through the communicating hole.

[0022] The infusion section is connected with the cannula section, an accommodating cavity in the cannula section is connected with an elastic member, a catheter is inserted through an insertion hole of the elastic member to realize assembly of the catheter and the catheter connector; wherein the elastic member and the accommodating cavity adopt a bullet head shape, so that in the process of connecting the infusion section and the cannula section, the top end of the infusion section will generally extend into the accommodating cavity to abut against one end of the elastic member and compress the elastic member with the distance between the infusion section and the cannula section shortening in the connecting process, and because of the bullet head shape of the elastic member, the small end size of the elastic member is smaller than the large end size, the small end will not be fixed in the accommodating cavity, so that the whole elastic member rotates synchronously with the infusion section under the abutting action of the top end, further, after the tapered outer surface of the elastic member is tightly connected with the inner wall of the cannula section in the tightening process, the elastic member will not continue to rotate, but only the infusion section rotates, so that the elastic member can be prevented from being twisted or partially twisted in the assembly process of the infusion section and the cannula section, and the elastic member can be prevented from extruding or even crushing the catheter due to the twisting, and the catheter can be prevented from being blocked due to the crushing.

[0023] 2. As a preferred embodiment of the utility model, a horn opening in communication with the accommodating cavity is formed on one side of the cannula section relative to the accommodating cavity, and the catheter is inserted into the insertion hole of the elastic member from one side of the horn opening.

[0024] The purpose of forming the horn opening on one side of the cannula section relative to the accommodating cavity is that, because the horn opening is larger than the insertion hole, the end of the catheter held by hand can be smoothly inserted into the insertion hole through the horn opening, and sufficient space is provided for the hand to move; and the horn opening has a horn-shaped arc surface which can guide the inserted catheter, so that even if the medical staff does not concentrate on inserting the catheter into the insertion hole along the axis direction of the insertion hole, the catheter can be smoothly inserted into the insertion hole along the inner arc surface of the horn opening.

[0025] 3. As a preferred embodiment of the utility model, the accommodating cavity includes a first accommodating cavity and a second accommodating cavity along the axis direction, the projection of the first accommodating cavity along the radial direction is in a conical structure, and the two sides are formed in an outwardly convex arc conical shape; the projection of the second accommodating cavity along the radial direction is in a square structure, and the two sides are formed in a horizontal shape; the first accommodating cavity has a communication opening formed on the side facing the horn opening and in communication with the insertion hole, and the communication opening is in communication with the horn opening, so that the catheter can enter the insertion hole through the horn opening and the communication opening.

[0026] The accommodating cavity is formed with a first accommodating cavity and a second accommodating cavity in the axial direction, the first accommodating cavity is in a conical structure and has a curved conical shape, which is matched with the shape of the elastic member, so as to facilitate sleeving the elastic member in the accommodating cavity; the second accommodating cavity is in a square structure, which facilitates the elastic member to be compressed in the horizontal direction and avoids deviation caused by inclined movement of the elastic member, so as to limit the movement direction of the elastic member and enable the elastic member to effectively lock the catheter; a communication port is formed in the first accommodating cavity and communicates with the insertion hole, so that when the elastic member is installed in the accommodating cavity, the insertion hole of the elastic member communicates with the communication port, and the communication port can also communicate with the horn opening, thereby facilitating the catheter to be inserted into the insertion hole through the horn opening and the communication port, and realizing accurate positioning of the catheter.

[0027] 4. As a preferred embodiment of the utility model, the elastic member has a thin end towards the horn opening side and a thick end towards the infusion section, the inner diameter of the thin end gradually increases to the thick end, and the insertion hole penetrating through the elastic member is formed in the thin end to the thick end in the axial direction, and the inner diameter of the insertion hole is the same as that of the opening hole on the side of the horn opening towards the thin end.

[0028] The elastic member has oppositely arranged thin and thick ends, the thin end is arranged towards the horn opening side, and the thick end is arranged towards the infusion section side, so that when the infusion section is connected to the cannula section, the top end of the infusion section can compress the thick end of the elastic member, and when the infusion section is screwed on the cannula section, the thick end is rotated by the infusion section, and the thin end with a smaller inner diameter can be synchronously rotated with the thick end, so as to realize synchronous rotation of the entire elastic member and avoid kinking of the elastic member; the insertion hole is formed from the thin end to the thick end for inserting the catheter, and the inner diameter of the horn opening is the same as that of the insertion hole, so as to facilitate smooth insertion of the catheter into the insertion hole.

[0029] 5. As a preferred embodiment of the utility model, an outer thread is formed on the outer periphery of the distal end of the cannula section, and an inner thread is formed on one end of the infusion section, the outer thread of the cannula section is connected with the inner thread of the infusion section, so that the infusion section is detachably connected to the outer side of the cannula section; or, a clamping groove is formed on the outer periphery of the distal end of the cannula section, and a clamping buckle is formed on one end of the infusion section, the clamping groove cooperates with the clamping buckle, so that the infusion section is detachably connected to the outer side of the cannula section.

[0030] The two embodiments can realize quick assembly when the cannula section cooperates with the infusion section; when the thread connection is selected, the outer thread arranged on the cannula section is screwed with the inner thread arranged on the infusion section, so that the infusion section can be partially connected to the outer side of the cannula section; when the clamping groove cooperates with the clamping buckle, the infusion section is directly inserted into the cannula section, which facilitates medical staff to quickly assemble in place during the busy work time. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0032] Figure 1 Fig. 1 is a schematic view of the overall structure of a tapered catheter connector according to an embodiment of the present application;

[0033] Figure 2 Fig. 2 is a schematic view of the structure of a cannula segment of a tapered catheter connector according to an embodiment of the present application;

[0034] Figure 3 Fig. 3 is a schematic view of a cross section of a cannula segment of a tapered catheter connector according to an embodiment of the present application;

[0035] Figure 4 Fig. 4 is a schematic view of the structure of an infusion segment of a tapered catheter connector according to an embodiment of the present application;

[0036] Figure 5 Fig. 5 is a schematic view of a cross section of an infusion segment of a tapered catheter connector according to an embodiment of the present application;

[0037] Figure 6 Fig. 6 is a schematic view of the structure of a resilient member of a tapered catheter connector according to an embodiment of the present application;

[0038] In the drawings,

[0039] 1, infusion segment; 11, first infusion segment; 12, second infusion segment; 2, resilient member; 3, cannula segment; 4, accommodating cavity; 5, insertion hole; 6, top-in end; 7, communication hole; 8, horn opening; 9, first cavity; 10, tapered hole; 13, first lug; 14, second lug; 15, connecting hole; 16, protrusion; 17, communication port. DETAILED DESCRIPTION

[0040] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details. In other instances, well-known methods have not been described in detail in order not to obscure the present application.

[0041] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation of the present application.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. In the description of the present application, the description of the terms "embodiment", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0045] The present application relates to a kind of tapered catheter connector, as shown in Figures 1-6 The catheter connector includes infusion section 1, elastic member 2 and cannula section 3;Cannula section 3 is provided with accommodating cavity 4 for mounting elastic member 2, elastic member 2 and accommodating cavity 4 are the same shape, and are bullet-shaped;Elastic member 2 is provided with insertion hole 5 for inserting catheter along the axial direction;Infusion section 1 is detachably connected to the distal end of cannula section 3, and infusion section 1 has top end 6 that can be inserted into accommodating cavity 4 and abutted against elastic member 2 when infusion section 1 is connected to cannula section 3, and communication hole 7 is provided in top end 6, and communication hole 7 is communicated with insertion hole 5, so that the liquid medicine in infusion device enters the catheter in insertion hole 5 through communication hole 7.

[0046] The infusion section 1 is connected with the cannula section 3, the accommodating cavity 4 in the cannula section 3 is connected with the elastic element 2, the catheter is inserted through the insertion hole 5 of the elastic element 2 to realize the assembly of the catheter and the catheter connector; wherein the elastic element 2 and the accommodating cavity 4 adopt a bullet head shape, so that in the process of connecting the infusion section 1 and the cannula section 3, the top end 6 of the infusion section 1 will generally extend into the accommodating cavity 4 to abut against one end of the elastic element 2 and compress the elastic element 2 with the shortening of the distance in the process of connecting the infusion section 1 and the cannula section 3, and due to the bullet head shape of the elastic element 2, the small end size of the elastic element 2 is smaller than the large end size, so that the small end will not be fixed in the accommodating cavity 4, the whole elastic element 2 rotates synchronously under the abutting action of the top end 6 and the infusion section 1, so that the elastic element 2 can avoid the kinking or local kinking phenomenon in the assembly process of the infusion section 1 and the cannula section 3, and the extrusion or even crushing phenomenon of the catheter caused by the kinking of the elastic element 2 is avoided, and the blocking phenomenon of the catheter caused by the crushing is avoided; and the elastic element 2 is positioned synchronously when the infusion section 1 and the cannula section 3 are assembled, so that the elastic element 2 is compressed and deformed to expand, and the radial size is further increased, the radial size of the insertion hole 5 is reduced to realize the rapid locking of the catheter.

[0047] As a preferred embodiment, the cannula section 3 is provided with a horn opening 8 on one side of the accommodating cavity 4, which is in communication with the accommodating cavity 4, and the catheter is inserted from one side of the horn opening 8 to extend into the insertion hole 5 of the elastic element 2.

[0048] The purpose of opening the horn opening 8 on one side of the cannula section 3 relative to the accommodating cavity 4 is that since the horn opening 8 is larger than the insertion hole 5, the end of the hand-held catheter can be smoothly inserted into the insertion hole 5 through the horn opening 8, providing sufficient space for the hand to move; and the horn opening 8 will have a guiding effect on the inserted catheter due to the arc surface of the horn shape, that is, even if the medical staff does not concentrate on inserting the catheter into the insertion hole 5 along the axis direction of the insertion hole 5, it only needs to enter the horn opening 8 along the inner arc surface of the horn opening 8 to smoothly guide the catheter into the insertion hole 5.

[0049] As a preferred embodiment, the accommodating cavity 4 includes a first accommodating cavity and a second accommodating cavity along the axis direction, the projection of the first accommodating cavity in the radial direction is in a conical structure, and the two sides form an arc conical shape protruding outward; the projection of the second accommodating cavity in the radial direction is in a square structure, and the two sides form a horizontal shape; the first accommodating cavity has a communication port 17 forming the end of the insertion hole 5 on the side of the horn opening 8, and the communication port 17 is in communication with the horn opening 8, so that the catheter enters the insertion hole 5 through the horn opening 8 and the communication port 17.

[0050] The accommodating cavity 4 has a first accommodating cavity and a second accommodating cavity formed in the axial direction, the first accommodating cavity is in a conical structure, and is in an arc surface conical shape, which is matched with the shape of the elastic member 2, so as to facilitate sleeving the elastic member 2 in the accommodating cavity 4; the second accommodating cavity is in a square structure, which is convenient for the elastic member 2 to translate and compress in the horizontal direction, avoids deviation caused by inclined movement of the elastic member 2, thereby limiting the movement direction of the elastic member 2, and enabling the elastic member 2 to effectively lock the catheter; a communication port 17 is formed in the first accommodating cavity and communicates with the insertion hole 5, so that when the elastic member 2 is installed in the accommodating cavity 4, the insertion hole 5 of the elastic member 2 communicates with the communication port 17, and the communication port 17 can also communicate with the horn opening 8, thereby facilitating insertion of the catheter through the horn opening 8 into the insertion hole 5 through the communication port 17, and realizing accurate positioning of the catheter.

[0051] As a preferred embodiment, the elastic member 2 has a thin end towards the horn opening 8 side and a thick end towards the infusion section 1, the inner diameter of the thin end to the thick end gradually increases, and the insertion hole 5 penetrating the elastic member 2 is formed in the axial direction from the thin end to the thick end, and the inner diameter of the insertion hole 5 is the same as the inner diameter of the opening hole of the horn opening 8 towards the thin end side.

[0052] The elastic member 2 has oppositely arranged thin end and thick end, the elastic member 2 is arranged as a thin end towards the horn opening side, and as a thick end towards the infusion section 1 side, so that when the infusion section 1 is connected to the cannula section 3, the top end 6 of the infusion section 1 can compress the thick end of the elastic member 2, and when the infusion section 1 is screwed on the cannula section 3, the infusion section 1 drives the thick end to rotate, and the thin end with smaller inner diameter can rotate synchronously with the thick end, realizing synchronous rotation of the entire elastic member 2, and avoiding kinking of the elastic member 2; the insertion hole 5 is formed from the thin end to the thick end, which is used for inserting the catheter, and the inner diameter of the horn opening 8 is the same as that of the insertion hole 5, so as to facilitate smooth insertion of the catheter into the insertion hole 5.

[0053] The assembly mode of the cannula section 3 and the infusion section 1 is not limited by the present application, and any one of the following embodiments can be used:

[0054] Embodiment one: an outer thread is formed on the outer periphery of the distal end of the cannula section 3, an inner thread is formed on one end of the infusion section 1, and the outer thread of the cannula section 3 is connected with the inner thread of the infusion section 1, so that the infusion section 1 is detachably connected to the outer side of the cannula section 3.

[0055] The distal end refers to the end far away from the catheter, and the proximal end refers to the end close to the catheter.

[0056] As Figure 1 and Figure 4As shown, the outer periphery of the distal end of the cannula segment 3 is provided with external threads, and the infusion segment 1 is provided with internal threads. The infusion segment 1 is connected to the outer periphery of the cannula segment 3 by screwing the internal threads of the infusion segment 1 with the external threads of the cannula segment 3.

[0057] Embodiment II: The outer periphery of the distal end of the cannula segment 3 is provided with a clamping groove, and one end of the infusion segment 1 is provided with a clamping buckle. The clamping groove and the clamping buckle are matched, so that the infusion segment 1 can be detachably connected to the outer side of the cannula segment 3.

[0058] In this embodiment, the following two embodiments can be used:

[0059] Embodiment I: The outer periphery of the distal end of the cannula segment 3 is provided with a clamping groove along the axis direction. The shape of the clamping groove can be square, circular arc or semicircular, which is not limited in particular. The clamping buckle is provided on the inner wall of the infusion segment 1 and protrudes from the inner wall of the infusion segment 1. The clamping buckle is matched with the shape of the clamping groove and corresponds to the position of the clamping groove. In use, the infusion segment 1 is sleeved on the outer side of the cannula segment 3 along the axis direction, and the clamping buckle is matched with the corresponding clamping groove to realize the matched connection of the infusion segment 1 and the cannula segment 3.

[0060] Embodiment II: The outer periphery of the distal end of the cannula segment 3 is provided with a clamping groove, and one end of the infusion segment 1 is provided with a clamping buckle. The clamping groove and the clamping buckle are matched, so that the infusion segment 1 can be detachably connected to the outer side of the cannula segment 3.

[0061] As a preferred embodiment, the infusion segment 1 comprises a first infusion segment 11 and a second infusion segment 12 connected together. The first infusion segment 11 is provided with a first cavity 9 inside, and the inner wall of the first cavity 9 is provided with internal threads connected with the cannula segment 3, so as to connect the first infusion segment 11 to the receiving cavity 4 of the cannula segment 3. The second infusion segment 12 is provided with a tapered hole 10 inside, which forms a plug-in part connected with the infusion device.

[0062] As shown in FIG. 1, the infusion device 1 comprises a cannula segment 3 and an infusion segment 1 connected with the cannula segment 3. Figure 3As shown, the infusion section 1 is provided as two connected first infusion section 11 and second infusion section 12, wherein the first infusion section 11 is used to be connected with the cannula section 3, and the second infusion section 12 is used to be connected with the infusion device, the inner thread provided on the inner wall of the first cavity 9 of the first infusion section 11 is used to threadedly connect the first infusion section 11 to the outside of the cannula section 3, otherwise, the first cavity 9 is not provided, and the first infusion section 11 cannot be sleeved on the outside of the cannula section 3; in order to realize the connection with the infusion device, the second infusion section 12 is provided with a taper hole 10, the cross-sectional shape of the taper hole 10 is conical, the large end of the taper hole 10 faces outward, and the small end of the taper hole 10 faces the first infusion section 11, the purpose is to realize that the infusion device of different sizes can be sleeved in the taper hole 10 from the large end of the taper hole 10, and the inclined inner wall of the taper hole 10 guides the infusion device to realize the positioning of the infusion device.

[0063] Further, the first cavity 9 is connected with a top-in end 6 extending along the axis, the top-in end 6 extends along the axis direction of the first cavity 9, the side of the top-in end 6 facing the second infusion section 12 is provided with a connecting hole 15 for placing the injection tip, and the connecting hole 15 is connected between the communication hole 7 and the taper hole 10 to communicate the communication hole 7 and the taper hole 10 to form a fluid channel for the drug solution to flow.

[0064] The top-in end 6 provided in the first cavity 9 is provided with a connecting hole 15 along the axis, and the catheter in the elastic member 2 enters the communication hole 7 of the top-in end 6 after passing through the insertion hole 5 of the elastic member 2; after the first infusion section 11 of the infusion section 1 is threadedly connected to the cannula section 3, the top-in end 6 can extend into the containing cavity 4 to abut and compress the elastic member 2, and through the compressed elastic member 2, the elastic member 2 is expanded in the containing cavity 4, the radial dimension is increased, and the inner diameter of the insertion hole 5 is reduced, so as to lock the catheter; in order to realize that the drug solution in the infusion device in the taper hole 10 can smoothly enter the first infusion section 11 and then flow into the catheter in the cannula section 3, the top-in end 6 is also provided with a connecting hole 15 communicated with the communication hole 7, the inner diameter of the connecting hole 15 is smaller than the inner diameter of the communication hole 7 and the small end of the taper hole 10, and the connecting hole 15 is arranged between the communication hole 7 and the taper hole 10 to communicate the communication hole 7 and the taper hole 10 to form a fluid channel for the drug solution to flow, and the drug solution is output from the infusion device and then enters the catheter in the communication hole 7 through the connecting hole 15.

[0065] Further, as shown in the drawings, Figure 3 The top-in end 6 and the inner wall of the first cavity 9 have a reserved gap therebetween, so as to form an installation space between the infusion section 1 and the cannula section 3 to facilitate the threadedly connecting of the infusion section 1 to the outside of the cannula section 3.

[0066] The gap between the top-in end 6 and the inner wall of the first cavity 9 forms an annular cavity outside the top-in end 6, which can accommodate the cannula section 3 when the infusion section 1 is screwed onto the outside of the cannula section 3, thereby realizing the mounting space of the cannula section 3 and the infusion section 1.

[0067] As a preferred embodiment, the first lug 13 is symmetrically connected to the outer periphery of the cannula section 3 in the radial direction, and the second lug 14 is connected to the outer periphery of the first infusion section 11 in the radial direction, and the rotation of the cannula section 3 through the first lug 13 and the rotation of the first infusion section 11 through the second lug 14 make the outer thread of the cannula section 3 and the inner thread of the first infusion section 11 screw together.

[0068] As shown in Figure 2 and Figure 4 The outer periphery of the cannula section 3 is connected to at least one pair of first lugs 13, and the outer periphery of the first infusion section 11 of the infusion section 1 is connected to at least one pair of second lugs 14, and when the infusion section 1 is screwed onto the outside of the cannula section 3, one hand of the medical staff can hold the first lug 13 to facilitate the rotation of the cannula section 3, and the other hand can hold the second lug 14 to facilitate the rotation of the infusion section 1, thereby screwing the infusion section 1 onto the outside of the cannula section 3.

[0069] As a preferred embodiment, the cannula section 3 and the infusion section 1 are made of transparent hard plastic material, and the elastic member 2 is made of soft and elastic transparent material.

[0070] The cannula section 3, the infusion section 1 and the elastic member 2 are made of transparent material, which facilitates the medical staff to observe whether each structure is installed in place when the elastic member 2 is installed on the cannula section 3 and the infusion section 1 is assembled with the cannula section 3, and the rotation state and the positioning position of the elastic member 2 during the assembly process can be observed, thereby facilitating quick assembly.

[0071] In addition, further, the outer periphery of the top-in end 6 has a plurality of protrusions 16 in the axial direction, which are used to abut the inner wall of the accommodating cavity 4 when the infusion section 1 is inserted into the accommodating cavity 4.

[0072] The parts not described in the utility model can be realized by using or referring to the existing technology.

[0073] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0074] The above merely illustrates the embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A tapered conduit connector, characterized in that, Includes the infusion section, elastic components, and catheter section; The cannula section has a cavity for installing an elastic element, and the elastic element has the same shape as the cavity, both being bullet-shaped; the elastic element has an insertion hole along the axial direction for inserting the catheter. The infusion section is detachably connected to the distal end of the insertion section. The infusion section has an insertion end that can extend into the receiving cavity and abut against the elastic element when the infusion section is connected to the insertion section. A connecting hole is provided in the insertion end, and the connecting hole is connected to the insertion hole so that the medicine in the infusion set enters the catheter of the insertion hole through the connecting hole.

2. A tapered conduit connector according to claim 1, characterized in that, The cannula section has a flared opening on one side of the receiving cavity that communicates with the receiving cavity, and the conduit is inserted from the flared opening side and extends into the insertion hole of the elastic member.

3. A tapered conduit connector according to claim 2, characterized in that, The receiving cavity includes a first receiving cavity and a second receiving cavity along the axial direction. The projection of the first receiving cavity in the radial direction is a conical structure, with the two sides forming an arc-shaped cone shape that bulges outward. The projection of the second receiving cavity in the radial direction is a square structure, with the two sides forming a horizontal shape. The first receiving cavity has a communication port on the side facing the horn opening, which is connected to the plug hole, so that the conduit can enter the plug hole through the horn opening and the communication port.

4. A tapered conduit connector according to claim 2, characterized in that, The elastic element has a thin end facing the horn opening and a thick end facing the infusion section. The inner diameter gradually increases from the thin end to the thick end. A insertion hole is provided through the elastic element from the thin end to the thick end along the axial direction. The inner diameter of the insertion hole is the same as the inner diameter of the opening hole facing the thin end of the horn opening.

5. A tapered conduit connector according to claim 1, characterized in that, The distal outer periphery of the cannula section is provided with an external thread, and one end of the infusion section is provided with an internal thread. The external thread of the cannula section is connected to the internal thread of the infusion section, so that the infusion section can be detachably connected to the outside of the cannula section. Alternatively, a groove is provided on the outer periphery of the distal end of the cannula segment, and a buckle is provided at one end of the infusion segment. The groove and the buckle cooperate to allow the infusion segment to be detachably connected to the outside of the cannula segment.

6. A tapered conduit connector according to claim 1, characterized in that, The infusion section includes a first infusion section and a second infusion section connected to each other; the first infusion section has a first cavity, and the inner wall of the first cavity has an internal thread for connecting to the insertion tube section, so as to connect the first infusion section to the receiving cavity of the insertion tube section; the second infusion section has a conical hole, which forms a plug-in part for connecting to the infusion set.

7. A tapered conduit connector according to claim 6, characterized in that, The first cavity is connected to a top inlet end that extends along the axis. The top inlet end extends along the axis of the first cavity. The top inlet end has a connection hole for placing the injection tip on the side facing the second infusion section. The connection hole is connected between the connecting hole and the conical hole to connect the connecting hole and the conical hole to form a fluid channel for drug flow.

8. A tapered conduit connector according to claim 7, characterized in that, There is a reserved gap between the top insertion end and the inner wall of the first cavity, so that an installation space is formed between the infusion section and the insertion section to facilitate the threaded connection of the infusion section to the outside of the insertion section.

9. A tapered conduit connector according to claim 6, characterized in that, The outer periphery of the insertion tube section is symmetrically connected with a first lug in the radial direction, and the outer periphery of the first infusion section is connected with a second lug in the radial direction. By rotating the insertion tube section through the first lug and rotating the first infusion section through the second lug, the external thread of the insertion tube section is screwed into the internal thread of the first infusion section.

10. A tapered conduit connector according to claim 1, characterized in that, The cannula section and the infusion section are made of a rigid, transparent plastic material, while the elastic element is made of a soft, elastic, transparent material.

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